Project Included

Susquehanna River Transmission Line Crossing — Pennsylvania


Riggs Distler completed this difficult reconductoring project for a transmission line spanning the Susquehanna River. The 1.1-mile river crossing is supported by three lattice towers, one of which is installed in the middle of the river. The line also passes above an energized 69kv line, active railroad track, a parking lot, fishermen in the river, and an active dam. Our work on this project involved:

  • Reconductoring two spans between three lattice towers
  • Upgrading existing aluminum wire with new 3M ACCR wire
  • Replacing step bolts and reinforcing the tower in the middle of the river
  • Installing new insulators on all structures
  • Working next to an energized 230kv line, creating induced voltage
  • Helicopter and boat-assisted work on a high-tension line 180 feet above the ground/water surface
  • Coordination with railroad authorities regarding an active railroad on-site
  • Self-performing all E&S and environmental matting for land-based towers

Challenges Overcome

The project involved complex logistical challenges. Ensuring the safety of our staff and the public was a foremost concern, as the project area saw continuous active use by pedestrians, boaters, vehicles, and trains. Since the line passed above an active railroad, all construction had to be scheduled around trains passing through the project area, requiring careful coordination with the railroad company. Installing 1.1 miles of new transmission line over a major river is no easy feat, and our team developed ingenious solutions, utilizing equipment trucks, boats, and helicopters to get the job done.

Results Delivered

Replacing the line with ACCR will eliminate tension issues and sagging due to changes in the weather, making it far less likely to be damaged by the water below. Riggs Distler’s ability to work hand in hand with public and private entities allowed us to mitigate complicated schedule and safety concerns throughout the life of the project. Our work will help ensure a consistent and stable source of power for end users in this region of Pennsylvania well into the future. Riggs Distler received a NECA EXCELLENCE AWARD from the Penn-Del-Jersey Chapter in the field of Overhead Transmission in 2018.

Project Included

Case Studies

15-Mile 69kV Transmission Line Rebuild—Southern New Jersey
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COC for Overhead Transmission Projects—DE, PA, NJ, MD, IL
January 2021–December 2025
Riggs Distler is the Contractor of Choice for all installation, maintenance, and repair work performed on our client’s electrical transmission...
115kV Transmission Line Rebuild—New Hampshire
May–June 2020
Riggs Distler was contracted to upgrade aging tower infrastructure along an important 115kV electrical transmission line in New Hampshire. In order...
Great Egg Harbor Crossing Rebuild Project—New Jersey
September–December 2020
Riggs Distler was contracted to assemble and install eight electric transmission towers to provide improved electrical service to customers in...
K43 Fiber Project - Vermont
January-June 2020
Riggs Distler was contracted to install 21 miles of new ADDS fiber-optic cable and support braces on a 115kV transmission line stretching from...
Switching Station Spare Transformer — New Jersey
February–May, 2020
24-Mile 138kV Transmission Line Rebuild — Monee, Illinois
January 2016-January 2017
Our host utility needed to replace an aging 138kv transmission line stretching 24 miles across northeastern Illinois. Working under a tight, ...
Hurricanes Katrina, Rita and Wilma Emergency Power Restoration — Louisiana, Alabama, Florida, Mississippi
August-December 2005
In 2005, Riggs Distler was hired to help restore power to areas affected by the devastating Hurricanes Katrina, Rita, and Wilma. It’s estimated...
Hurricane Sandy Emergency Power Restoration — New Jersey
November 2012
As Hurricane Sandy’s landfall along the mid-Atlantic coast became imminent, Riggs Distler immediately set to work preparing vehicles, equipment,...
Post-Hurricane Power Restoration — Puerto Rico
After multiple Category 3+ hurricanes decimated the Puerto Rico Electric Power Authority grid in 2017, Riggs Distler quickly mobilized to help...
13kV & 23kV Circuit Refurbishment — Massachusetts
Riggs Distler was contracted to reconductor approximately 20 miles of 13kV and 23kV circuits and replace over 500 wooden utility poles for an...
Susquehanna River Transmission Line Crossing — Pennsylvania
Riggs Distler completed this difficult reconductoring project for a transmission line spanning the Susquehanna River. The 1.1-mile river crossing is...
30-Mile 138kv New Build/69kV Transmission Line Rebuild — Virginia & Maryland
Riggs Distler rebuilt 30.9 miles of 138/69kV transmission line over five different outage windows in 2017–18 to deliver improved electric...
41-Mile 230kV/138kV Transmission Line Rebuild — New Jersey
November 2017–May 2019
Riggs Distler was selected as the general contractor on this important transmission line rebuild. Project will deliver a more capable and reliable...